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Table 4 Odds ratios (OR) and 95% confidence intervals (CI) of cataract subtypes for categories of corrected and non-corrected outdoor exposure

From: Years of sunlight exposure and cataract: a case-control study in a Mediterranean population

  Outdoor exposure from 10 am-4 pm corrected for protective factors (years; fifths)
  < 0.073* 0.073 – 0.190 0.191 – 0.428 0.429 – 0.800 > 0.800 Trend test (p-value)
Pure nuclear (No. of cases = 100)      
OR§ 1 2.37 3.36 2.02 3.19 0.05
(95% CI)   (0.88, 6.38) (1.32, 8.54) (0.75, 5.44) (1.24, 8.21)  
Pure cortical (No. of cases = 40)      
OR§ 1 0.55 0.58 0.51 0.29 0.09
(95% CI)   (0.18, 1.71) (0.20, 1.72) (0.16, 1.67) (0.78, 1.09)  
Pure posterior (No. of cases = 62)      
OR§ 1 0.76 1.01 0.58 0.57 0.23
(95% CI)   (0.27, 2.12) (0.40, 2.56) (0.21, 1.62) (0.20, 1.60)  
  Outdoor exposure from 10 am-4 pm (years; fifths)
  < 0.312* 0.312 – 0.612 0.613 – 0.968 0.969 – 1.428 > 1.428 Trend test (p-value)
Pure nuclear (No. of cases = 100)      
OR§ 1 2.22 1.28 1.86 3.68 0.01
(95% CI)   (0.88, 5.61) (0.47, 3.52) (0.70, 4.91) (1.50, 9.01)  
Pure cortical (No. of cases = 40)      
OR§ 1 0.50 0.47 0.12 0.67 0.28
(95% CI)   (0.17, 1.44) (0.16, 1.42) (0.03, 0.55) (0.22, 2.00)  
Pure posterior (No. of cases = 62)      
OR§ 1 0.42 0.62 0.42 0.57 0.09
(95% CI)   (0.15, 1.16) (0.24, 1.60) (0.15, 1.14) (0.22, 1.45)  
  1. A total of 7 controls were excluded because of missing values
  2. * Reference category
  3. Chi-squared test for linear trend with 1 df.
  4. §ORs are adjusted for sex, age, smoking history, alcohol consumption, education and serum levels of antioxidant vitamins